Read your post with interest as I do have a countertop Panasonic Inverter Microwave Model NN-S760WA that I bought in late 2000. It just died this week, so yes, it did last over 5 years. It will turn on briefly but shut off after a 4-5 seconds, not enough to heat anything.

I checked the interlock switches and they are OK, but that's about as far as I got. It was a nice unit while it lasted. Not knowing much about Inverter ovens, any diagnostic suggestions while I have the patient open prior to sending it to microwave heaven?

Hi Master iceman,

God of the mighty Panasonic Inverter Microwave, could you help me ?

I have exactly the same problem as the guy I quoted above. Microwave will work for a few seconds at a time at most.

It was slightly arcing due to excess grease, because of the bad integrated hood fan design, grease manage to get inside the microwave electronics.

Managed to fix the arcing problem with a good cleaning, but obviously something is damaged.

The high voltage power diode looks to be burnt, due to blackened PCB in the area... I wonder why it still works for a few seconds on the other hand... could it be only a fan problem then the microwave enter in protection mode ?

Diode is UX-C2B made by SANKEN Electric, now discontinued part worth 30$ on eBay with no SANKEN Electric equivalence, but a local store can supply an equivalent from another brand for 5$.